dsh-niulai-pet: A desktop pet that yells "Mom~~~" upon task completion in the dsh web corner

`dsh-niulai-pet` is a desktop pet plugin specifically developed for dsh web, aiming to transform Agent task completion feedback into visual and interactive lightweight objects. Running in the corner of the interface, this plugin supports providing feedback through sounds, bubbles, and animations upon task completion, and features configurable multiple desktop pets, 9 built-in skins, and custom character pack import functionality. Its core features include voice wake-up technology, supporting model recognition based on sherpa-onnx and MFCC+DTW template matching, allowing users to control looped shouts via voice commands. The plugin offers rich daily interactions, such as idle animations, runtime timer bubbles, drag position memory, and physical collisions. For configuration, in dsh rc.7+ versions, it can be persisted to `settings.yaml` through a settings card, while older versions fall back to `localsettings.yaml`.